<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        #box{
            width: 200px;
            height: 200px;
            border: 2px solid red;
            border-radius: 100%;
            overflow: hidden;
            /* overflow: visible; */
            /* overflow: auto; */
        }

        #box img{
            height: 200px;
        }
    </style>
</head>
<body>
    <!--  
        1. 溢出
            详写:
                overflow-x: hidden      隐藏溢出的内容
                             visible     显示溢出的内容
                             auto        将溢出的内容通过滚动条显示

                overflow-y: hidden | visible | auto;

            简写:
                overflow: hidden | visible | auto;
    -->

    <div id="box">
        <img src="./resource/1.jpg" alt="">
    </div>

</body>
</html>